Clamp for button-hole sewing-machines



(N0 ModeL) R. O.BRYDEN.

CLAMP FOR BUTTON HOLE SEWING MACHINES.

Patented June 9, 1885.

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UNITED STATES ROBERT c. BRYDEN, OF HAVEBHILL,

PATENT OFFICE.

MASSACHUSETTS, ASSIGNOR TO THE SINGER MANUFACTURING COMPANY OF NEWJERSEY.

SPECIFICATION forming part of Letters Patent No. 319,880, dated June9,1885.

Application filed February 20, 1855. (N model.)

To aZZ whom it may concern-.-

Be it known that I, ROBERT C. BRYDEN, a citizen of the United States,residing at Haverhill, in the county of Essex and State ofMassachusetts, have invented certain new and useful Improvements inClamps for Button- Hole Sewing-Machines, of which the following is aspecification, reference being had therein to the accompanying drawings.

The object of my invention is to add to the convenience of cloth orfabric clamps for button-hole sewing-machines by providing means wherebythe spring-depressed guide-pins of such clamps may be quickly and easilylifted I I 5 from the groove of the feedingwheel when the button-hole isfinished. To effect this result I provide a lifting-lever with which theguidepin is in engagement, and by which it may be quickly raised whenrequired, said lever being pivoted to an arm or bracket on the guidepiupost.

In the drawings, Figure 1 is aplan view of a cloth-clamp embodying myinvention, and Fig. 2 is a sectional elevation of the same.

A indicates the base-plate by which the clamping-jaws are carried, and Bis a hollow post attached thereto, through which post the guidepin 0passes. The post B has an arm or bracket, b, to which is pivoted theliftinglever D, and to the top of said bracket is attached a spring, E,the free end of which is in engagement with the pin 0, the said springserving to depress the said pin, and the latter being preferablyprovided with a flange, a, or other projection, near its top, beneathwhich the top or forward end of the lever D extends.

The post Bis provided at its top with a notch in which the lifting endor toe of the lever D fits, said lever,when not in use, being held inplace between the bottom wall of said 0 notch and the flange c. Astop-pin, 1), serves to limit the lifting movement of the lever D.

By depressing the rear end of the lever D the guide-pin C may be quicklyand easily lifted, thus obviating the inconvenience incidental to theclamps heretofore in use, in which the guide-pins are lifted by pullingupward on their heads.

I claim as my invention In a button-hole clamp, the combination, withthe base-plate, of a hollow post having a notch at its top and an arm orbracket, a guide-pin fitting in said post and having a flange orprojection, a lifting-lever pivoted to said bracket and extending intosaid notch beneath said flange or projectiomand a spring for depressingsaid pin, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT C. BRYDEN.

Witnesses:

HENRY P. TYLER, J OHN 0. Lucy.

